Timer



July 21, 1925. 1,546,517

L.SOKOL TIMER Filed March 8, 1924 ATTORNEY.

Patented July 21, 1925.

LEO $01101 1? DUNCAN, NEBRASKA.

TIMER.

,ap licationfilcdMarch 8, 1924. Serial u 69 834,

To all 1201mm it may concern:

Be it known that I, L110 SoKoL, a citizen of the United States, residing at Duncan, in the county of Platte and State of Nabraska, have invented certain new and useful Improvements in Timers, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates 'to' improvements in timers and has for an important object thereof the provision of a timer which may be readily installed by the layman and in which at. the same time the eiiiciency of the timer is not reduced;

A further object of the invention is to provide an improvement in that type of timer in which the timer shell carries a plurality of arms arranged to contact upon the periphery of the timer shaft carried rotor, so that these arms; during replacement of the timer be held'not only radially of the rotor, as is customary, but axailly of: the timer shell thereby permitting them to spread and position themselves about the rotor.

A further object of the invention is, to provide a device of thischaracter in which the arms of the shell are loosely mounted, together with means upon the timer shell and means upon the rotor coacting with the arms to. hold them in proper alignmentwith the contact ofthe rotor when the rotor shell is in applied position.

These and other objects. I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein z,

Figure 1 is a-rear elevation of the timer shell j Figure 2 is a similar elevation, the rotor being shown in place and section;

Figure 8 is a section on the line 33 of Figure 1;

Figure 4 is a similar section, the timer being shown during application thereof to the timer shaft;

Figure 5 is a section on the line 55 of Figure 2.

Referring now more particularly to the drawings, the numeral indicates a timer shell having atcircumferentiallyfl spaced points insulating bushings 11 shouldered internally of the shell as at 12. Threaded through each of the bushings 10 is a headed element 13, the head 14 of which is disposed interiorly of the shell in spaced relation-to the adjacent end of the bushing 11. The outer end of this threaded element projects beyond the outer end of the bushing and has mounted thereon a binding nut 15. by means of which a lead wire may be attached and electrically connected to this headed element., Abutting the inner face of the bushing 11 and having threaded engagement with the element 13. is an angle plate 16, the angle arm of which is disposed at that side of theplate remote from the open side of the timer shell in a direction axial of the timer, Mounted upon this plate is one arm 17 of a contact 18, this arm having an opening of such diameter that the arm may be rocked in any directionupon the element 13, with the plate 16 as a base, for a consider-able angle. Between the head 14 of the element 13 and the adjacent face of the arm 17 of the contact 18, a spring 19 surrounds the element 13, and tends to maintain the arm 17 of the contact 18 in engagement with the angle plate 16 to establish an electrical contact therebetween. An electrical contact between the member 13, and the contact 18 is further established through the spring 19.

The numeral 20 designates a timer shaft of any desired construction having secured thereto, a rotor 21 comprising an inner c0I1- ducting spring 22 engaged with and secured ,to. the shaft 20. and an outer insulating body 9A bearing a contact 25 electrically connected with the spring-22. This, insulating body is provided at the end thereof remote from the end of the shaft 20 with a .peri heral flange 26 which is likewise of insu ating material. The remaining arms 27 of the contacts 18 are so. arranged that they have, wiping: contact against the periphery of the insulating shell 24 when the timer is in applied position and are so constructed that they normally occupy positions upon the diameter smaller than that of the member 26L so that they are spring-pressed by the springs 19 against this member. Since the opening 28 of the arm 17 of the contacts 18 is of such size that it would permit movement of the arms about the member 13, it will be obvious that some means must be provided to maintain the ends of the arms 27 of the contacts in a direction generally indicated by the axis of the timer shell or of the shaft 20. This is accomplished by the combination of the angle plate 16 and the insulating flange 26 of the member 24:, the

brought about by the engagement of the angle plate preventing this movement in one direction during normal operation and the insulating flange preventing it in the oppositedirection. At the same time when the timer is being applied it will'be seen that after the timer shell is placed upon the 'end of the shaft to position it properly uponthe shaft, since the arms 27 are arranged upon a diameter smaller than the diameter of the member 24:, these arms will come into contact with the ends of the mem- 'ber 24. It is this feature of the construction of this type of timer which renders the same veryjdifiicult to apply and which has, hitherto caused this type timer tofall,

into disfavor. v r With the constructionrwhich I have de-' scribedit will be seen that when these arms are engaged by the ends of themembers 24 because of their loose mounting upon the member 13 they may oscillate. This is side face ofthe arm l7 with the outstanding flange of the angle plate 16 which limits movement of this end of the arm 27 in a 7 direction axially of "the timer. The free mounting permits the inner ends of the arms 27, however, to'contlnue to move in this 7 7 the end of the member 24 until they finally slip over the edge of the member 24 and come to rest against the flange 26 thus rendering the device very readily applied.

It will furthermore be obvious that since the contact arms are'formed from a single :piece of metal, which may be readily produc ed by stamping, and the remaining portions of the device maybe very cheaply produced, a timer constructed in accordance with my invention may be placed upon the. marketat a comparatively low cost.

It'will furthermore be obvious that theiconstruction hereinbefore described is capable of a considerable range of change and modification without materially departing from the spirit of myinvention and I accordingly do not limit myself to such specific structureexcept as hereinafter claimed.

I claim 1 11. In a timer, wardly projecting contact arms carried by the shell, a mounting for the outer ends of said arms permitting movement of the inner ends thereof in a direction radial to the axis of the shell and in the general direction of the axis, including a, part yieldably' resisting movement of such inner end in either of such directions and normally maintaining such inner ends in one position with relation to theshell, and a contact bearing rotorforsaid shell of greater diameter than the inscribed circumference of such inner ends, said mounting including a part preventing bodily movement of said arms in the general direction of the axis in one direction, said rotor including a part preventing bodily movement of the arms in the general direction of the axis of the shell in the opposite direction. V 7

2. In a timer, a shell, insulating bushlngs carried by said shell at circumferentially spaced points, headed elements threadedin said bushings and having the heads thereof disposed inwardly, L-shaped cona shell, a plurality of in tact members having one arm thereof loosely mounted upon the headed elements between the heads thereof and the innerends of the bushings, and springs disposed between said arms and said heads.

3.:In a timer shell, headed elementssupported by said'shell at points spaced circumferentially thereabouts and insulated from the shell, the heads of'said elements being inwardly directed, L-shaped contact members having one arm thereof loosely mounted upon the headed elements interiorly of the shell, and springs disposed be tween saidarms andsaid heads In testimony whereof Iherennto affix my signature. 7 I v :1 I

. LEO SOKOL; 

